ssh banners

 This command will output SSH banners from the server as pseudo-terminal is not allocated.

#!/bin/bash

ssh <user>@<server> << EOF

echo 'hi A'

EOF

In order to remove the banner, we can either change the command as follows:

#!/bin/bash

ssh <user>@<server> 'exec bash' << EOF

echo 'hi A'

EOF

or easiest way is 

touch ~/.hushlogin